package com.rop.ecommerce.advice;

import cn.hutool.core.convert.Convert;
import cn.hutool.core.util.ObjectUtil;
import com.rop.ecommerce.annotation.IgnoreResponseAdvice;
import com.rop.ecommerce.vo.CommonResponse;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

import java.util.Objects;

/**
 * @Title: CommonResponseDataAdvice
 * @Author Rop
 * @Date 2023/9/29 13:11
 * @description: 实现接口统一响应
 */

@RestControllerAdvice("com.rop.ecommerce")
public class CommonResponseDataAdvice implements ResponseBodyAdvice<Object> {

    /**
     * 判断是否需要对响应进行处理
     * @param methodParameter
     * @param aClass
     * @return
     */
    @Override
    @SuppressWarnings("all")
    public boolean supports(MethodParameter methodParameter, Class<? extends HttpMessageConverter<?>> aClass) {

        if (methodParameter.getDeclaringClass().isAnnotationPresent(IgnoreResponseAdvice.class)) {
            return false;
        }

        if (Objects.requireNonNull(methodParameter.getMethod()).isAnnotationPresent(IgnoreResponseAdvice.class)) {
            return false;
        }

        return true;
    }

    @Override
    @SuppressWarnings("all")
    public Object beforeBodyWrite(Object o, MethodParameter methodParameter, MediaType mediaType, Class<? extends HttpMessageConverter<?>> aClass, ServerHttpRequest serverHttpRequest, ServerHttpResponse serverHttpResponse) {

        CommonResponse<Object> response = new CommonResponse<>(0, "");

        // 定义最终的返回对象
        if (ObjectUtil.isNull(o)) {
            return response;
        } else if (o instanceof CommonResponse) {
            response = (CommonResponse<Object>) o;
        } else {
            response.setData(o);
        }

        return response;
    }
}
